Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements
Webcast-Catalyst9k
New Member

C6500 Storm control - Different level for Broadcast & Multicast

Hi,

we configured broadcast storm control on our C6500. We would like now to add multicast storm control, but with another value (bigger) than for broadcast.

The problem is when I configure multicast level, it changes automatically the value for broadcast.

Is it a way to avoid that?

Regards.

D.

2 REPLIES
VIP Super Bronze

C6500 Storm control - Different level for Broadcast & Multicast

Hi,

That is a normal behavior.  If you configure broadcast at 5% and than later configure multicast at 7%, the router will change the broadcast to 7%.

have a look at this example:

This example shows how the traffic storm control level configured for one mode affects all other modes that are already configured on the Gigabit Ethernet interface 4/10:

Router# show run inter gig4/10

Building configuration...

Current configuration : 176 bytes

!

Router# interface GigabitEthernet4/10

Router# switchport 

Router# switchport mode access

Router# storm-control broadcast level 0.5

Router# storm-control multicast level 0.5

Router# spanning-tree portfast edge 

Router# end

Router# configure terminal

Router(config)# interface gigabitethernet 4/10 

Router(config-if)# storm-control unicast level 0.7 

Router(config-if)# end

Router# show interfaces gig4/10 counters storm-control

Port UcastSupp % McastSupp % BcastSupp % TotalSuppDiscards 

Gi4/10 00.70 00.70 00.70 0 

Router#

config guide:

http://www.cisco.com/en/US/docs/switches/lan/catalyst6500/ios/12.2SX/configuration/guide/storm.html

HTH

New Member

C6500 Storm control - Different level for Broadcast & Multicast

This behavior is not really nice as broadcast traffic is normally less important that multicast.

If I have, let's say, video on my network, I would like to have a limit of 50 Mbps for multicast.

Beside that, I want my have a broadcast limit of  5Mbps, to protect my CPU.

Is there a solution?

317
Views
0
Helpful
2
Replies
CreatePlease to create content